Cloudy or "milky" surface of soft (Ag, Al, etc) single crystals. How to avoid?

Hi all, sorry for double-posting, but the "discussion topic" doesn't seem to get enough attention. We have recently started to work with Al single crystals for surface science experiments....

30 July 2020 2,603 3 View

Abaqus high stresses?

Hello , Recently I received a strange effect: stresses in the outcome are higher, then those specified by Plastic material performance, i.e. there was specified 180MPa, while in the odb frame I...

02 July 2020 4,118 4 View

Humic acids degradation by microorganisms?

Is there any new info on microbial degradation of humic acids in or out of soil?

07 March 2018 1,087 2 View

Inflamation by dead cells?

If dead cells of microorganisms forming a biofilm on a stent, accumulate due to actions of antimicrobials, could they provoke inflamation?

27 February 2018 8,671 3 View

How to immobilize lactic acid producing bacteria on the surface of medical devices?

Do you know some cheap hydrogel to cover the surface of medical devices?

25 February 2018 8,916 2 View

How to make small FOV collimator?

I have a sensor and I want to make really small FOV, like 0.1 degree.So, I use lens, which focus light into pinhole. So FOV is Tan(D/f)^-1, where D is pinhole size, f is focal length. It means, If...

18 September 2017 3,889 3 View

Is it possible to predict UV-VIS absorption spectra of polyconjugated polymers?

Hi, and thanks for taking a look. There are well-known Woodward-Fieser rules that allow predicting the absorption peak locations in diene compounds that may have unsaturated substituents attached...

07 June 2017 9,188 2 View

Has anyone else experienced this problem with Omicron (Focus) EFM 3/4 evaporator?

I would like to deposit iron from the commercial e-beam evaporator, in UHV, but I can get no emission current, fhile flux monitor shows negative flux in the range of nA. I would guess, this is the...

06 March 2014 5,862 9 View

What do you think are the most effective measures to suport the economic activity in the COVID-19 environment?

What is your opinion about the effectiveness and efficiency of economic measures taken in the times of that specific crisis? Why do you think measures taken in your country gave a positive (or...

01 January 1970 4,149 21 View

Cloudy or "milky" surface of single crystals. Protocol for annealing to avoid mesoscopic roughness. Al(111) and others

Hi all, we have recently started to work with Al single crystals for surface science experiments. Unfortunately, after a few cleaning cycles the crystal surface gets cloudy or "milky". Our...

01 January 1970 9,395 1 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View